Posts Tagged ‘warming’
Organic Photovoltaics: Towards Low-Cost Solar Energy
Organic photovoltaics (OPVs) are promising for developing low cost solar energy conversion technologies. Bulk heterojunction polymer solar cells now have power conversion efficiencies of up to 6-8%. Realization of higher efficiency (greater than 10-15%) requires advances in new polymer semiconductors and device optimization.
Towards this end, our laboratory is exploring molecular and nanoscale engineering approaches to tailoring materials for high performance polymer solar cells. In this talk I will use several examples to illustrate our efforts, including small band-gap donor polymers, nanostructured assemblies of block copolymers, and self-assembled polymer nanowires for constructing efficient polymer and hybrid polymer/nanocrystal solar cells. To overcome the drawbacks of fullerenes new acceptor materials are also being developed for OPVs.
Biography: Samson A. Jenekhe holds the Boeing-Martin Endowed Professor of Chemical Engineering and Professor of Chemistry at the University of Washington. He received the Ph.D. (Chemical Engineering, 1985) from the University of Minnesota. His research interests are in the chemistry, physics, and engineering of organic semiconductors, electronic and optoelectronic devices, materials and devices for solar energy technologies, self-assembly and soft nanotechnology, and polymer science. He is a Fellow of the American Association for the Advancement of Science and a Fellow of the American Physical Society.
Duration : 0:31:48
BREAKING NEWS BP OIL SPILL UPDATE live video BP ACCIDENTLY BLOWS SOMETHING ON THE BOP part 5
there are 4-5 videos please watch all of them to understand what happened…. they are attempting to cut something off of the BOP and drop the saw…. the recover the saw… start to cut again…. something happens to make the operator of the ROV panic and escape the area… then something blows!!! What in the world just happened????
Duration : 0:7:54
How Much Does Solar Energy Cost?
http://solarenergyhomesystem.blogspot.com/ Click Here to Get How To Make Solar Energy Panels. This video is only introduction.
Duration : 0:0:56
History And Uses Of Wind Power As An Energy Alternative / Documentary Video
Wind As An Energy Alternative / Educational video. Department of Energy. Produce by the Solar Energy Research Institute. Wind: An Energy Alternative. This program looks at the history and uses of wind power, used for centuries by humans to move boats, pump water and grind grain including discussions on efficiency, problems in the urban environment, experimental systems and windmill use across the United States. Producer: Department of Energy. Creative Commons license: Public Domain.
Surprisingly good short film about wind energy. What makes it valuable is the interviews with Marcellus Jacobs (a builder of wind turbines in the 1930s) and Ted Finch (whose efforts got the concept of net metering legally acceptable in the US). It’s interesting to note that one of the people listed in the credits, Paul Gipe, is still active in the industry. He’s now a leading author on the subject. His website is http://www.wind-works.org
Duration : 0:12:17
The Combined Power Plant – 100% from renewable energy
http://www.unendlich-viel-energie.de
The secure and constant provision of power anywhere and at anytime by renewable energies is now made possible thanks to the Combined Power Plant. The Combined Power Plant links and controls 36 wind, solar, biomass and hydropower installations spread throughout Germany. It is just as reliable and powerful as a conventional large-scale power station.
The Combined Renewable Energy Power Plant shows how, through joint control of small and decentralised plants, it is possible to provide reliable electricity in accordance with needs. The Combined Power Plant optimally combines the advantages of various renewable energy sources. Wind turbines and solar modules help generate electricity in accordance with how much wind and sun is available. Biogas and hydropower are used to make up the difference: they are converted into electricity as needed in order to balance out short-term fluctuations, or are temporarily stored. Technically, there is nothing preventing us from 100 per cent provision with renewables.
The Combined Power Plant is an initiative of the companies Enercon GmbH, Schmack Biogas AG and SolarWorld AG, and is supported by many partners from the renewable energy sector.
Duration : 0:7:26
MWTT Maglev Wind Turbine
http://www.maglevwindturbine.com
Demo CGI for proposed 2GW Magnetic Leviatated wind Turbine.
*Efficient Frictionless Power Generation with less maintenance, compared to HAWT.
No oil change or replacement of the bearings, gears.
Since, MAGLEV does NOT require such.
** Current bearing technology has forced wind turbine designers into horizontal spindle three bladed wind turbines. In this design the huge blades are connected to a spindle in the center. The bearings that support the spindle and control the pitch of the blades (which can be hundreds of feet long) see huge pitch-moment loading, some of which is manifest as torque energy that is focused through the center spindle. The target speed for the spindle is 18 or 20 rpm and the bearings holding the spindle are mounted in a huge casting which also contains a large gearbox stepping the speed up to 1800 to 2000 RPMs which allows for the proper surface speed relationship between the coils and magnets. It is necessary to invert or condition the current, which is expensive. This gearbox is full of many large bearings, gears and castings; for a 2 MW turbine the gearbox can easily weigh 30 tons. This gearbox needs to be mounted on the top of a pole more than 150 feet in the air and be able to support the turbine blades under full-force wind conditions.
***MAGLEV Power Generation, the pitch moment ratio is closer to 1-to-1 then the 100-to-1 as with a horizontal spindle design.
Duration : 0:1:41
$1 portable, collapsible solar hot water collector
Making hot water using unmodified trash bags (which were later used for their intended purpose). You can’t beat the ROI on these DIY solar collectors. In cold, cloudy or windy climates, an additional layer of plastic can be put over the top to hold the heat in like a greenhouse. Some day I will replace these with an inclined box and a toilet valve filler, complete with shower head.
This video is licensed under the Creative Commons Attribution 2.5 Generic license. In short: you are free to share and make derivatives of this work under the conditions that you appropriately attribute it. Any of the above conditions can be waived if you get permission from the copyright holder.
Duration : 0:0:48
SOLAR HOT WATER 2 DIY USING BLACK WATER HOSE SOLAR WATER HEATER SUN POWER
Part 2 of a 2 part series showing how to install a cheap cost effective solar hot water heater. http://greenpowerscience.com/
Duration : 0:6:17
DIY CHEAPEST Solar Panel System Ever Part 2
Solar panel update video with the cheapest solar panel system ever. See how you can use solar power at your house NOW. see part 1
Duration : 0:3:15
Plug-In Wind Power!
Featured in Popular Science alongside GE and Google on products that they see as game changers: http://www.popsci.com/entertainment-amp-gaming/article/2009-04/presidential-power
Fast Company Magazine has this to say about the Jellyfish:
http://www.fastcompany.com/blog/anya-kamenetz/green-day/google-checks-out-pc-renewable-energy
Jellyfish Wind Power Concept:
What if you could plug renewable wind energy into the wall just like a blender or a toaster? Instead of using power, a wind appliance actually generates it!
For more details visit:
http://www.clariantechnologies.com/
Smart-Grid Enabled:
With onboard Wi-Fi/WiMAX the Jellyfish is also smart-grid enabled. Today, wind and solar-powered homes are operated as autonomous points within the local electrical grid. However, they are an overlooked, yet important electrical power resource. If instead, each were harnessed collectively and tied interactively with the local utility grid as a Point-to-Grid (P2G) power generator, or even regulator, considerable economic, environmental and system reliability benefits are possible. By itself, each of these power sources is indeed small in its impact on the power system. In the aggregate, however, the economic value of P2G power is significant, more than enough to offset the initial cost of installing the required control hardware and integrating these systems with the local utility grid. Equally important, the necessary regulatory and energy distribution infrastructure, and hardware components to enable a number of different types of P2G-based systems are already in place today. The convergence of existing distributed electric power and Wi-Fi/WiMAX technologies creates an emerging market opportunity for technology and service providers to enable and accelerate the introduction of various types of P2G-enabled power generation.
Duration : 0:0:54